Starting letter Baby name as per date of birth?

My boy baby was born on 04.06.2011 at 10:10 A.M at Delhi. Can anyone tell me what should be first letter of his name and where can I get free janamkundli/horoscope for him ? Can you suggest the best website? And also tell me the best way to select the name (base on birth date ? or rashi ? or naksaktra ?